/*
 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package java.security.spec;

import java.math.BigInteger;

/**
 * This class specifies a DSA public key with its associated parameters.
 *
 * @author Jan Luehe
 * @see java.security.Key
 * @see java.security.KeyFactory
 * @see KeySpec
 * @see DSAPrivateKeySpec
 * @see X509EncodedKeySpec
 * @since 1.2
 */

public class DSAPublicKeySpec implements KeySpec {

  private BigInteger y;
  private BigInteger p;
  private BigInteger q;
  private BigInteger g;

  /**
   * Creates a new DSAPublicKeySpec with the specified parameter values.
   *
   * @param y the public key.
   * @param p the prime.
   * @param q the sub-prime.
   * @param g the base.
   */
  public DSAPublicKeySpec(BigInteger y, BigInteger p, BigInteger q,
      BigInteger g) {
    this.y = y;
    this.p = p;
    this.q = q;
    this.g = g;
  }

  /**
   * Returns the public key {@code y}.
   *
   * @return the public key {@code y}.
   */
  public BigInteger getY() {
    return this.y;
  }

  /**
   * Returns the prime {@code p}.
   *
   * @return the prime {@code p}.
   */
  public BigInteger getP() {
    return this.p;
  }

  /**
   * Returns the sub-prime {@code q}.
   *
   * @return the sub-prime {@code q}.
   */
  public BigInteger getQ() {
    return this.q;
  }

  /**
   * Returns the base {@code g}.
   *
   * @return the base {@code g}.
   */
  public BigInteger getG() {
    return this.g;
  }
}
